Same happened me, I sent an email questioning it. It was a mistake on theyr end. And they said I didn't have to do 2nd test. I advise u to email them.Possibly your face was not fully visible during all/some of time of the test hence retake of test is sent.
Possibly this will be with the officer while he/she is online and you might be verbally giving answer to the questions he/she shares in MS Teams meeting.
Were there problems during your test? Do you remember that your face was visible all the time and no issues with your webcam?
There is not test window like last time, right?
This is the issue with cic. Instead of reviewing the test result within a month, they took 3 months to get back. already we wasted a year in pandemic and officer is wasting few more months just like that.
Ok. So start preparing as you might not be remembering all the dates and names. After reading the book couple of times, start your online practice next full week.